/*****************************************************************************/
/*                                                                           */
/*                                 asmcode.c                                 */
/*                                                                           */
/*          Assembler output code handling for the cc65 C compiler           */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/* (C) 2000-2009, Ullrich von Bassewitz                                      */
/*                Roemerstrasse 52                                           */
/*                D-70794 Filderstadt                                        */
/* EMail:         uz@cc65.org                                                */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/

/* common */
#include "check.h"

/* cc65 */
#include "asmcode.h"
#include "codeseg.h"
#include "dataseg.h"
#include "segments.h"
#include "stackptr.h"
#include "symtab.h"

/*****************************************************************************/
/*                                   Code                                    */
/*****************************************************************************/

void GetCodePos(CodeMark *M)
/* Get a marker pointing to the current output position */
{
  M->Pos = CS_GetEntryCount(CS->Code);
  M->SP = StackPtr;
}

void RemoveCodeRange(const CodeMark *Start, const CodeMark *End)
/* Remove all code between two code markers */
{
  /* Nothing to do if the range is empty */
  if (Start->Pos == End->Pos) {
    return;
  }

  /* Delete the range */
  CS_DelCodeRange(CS->Code, Start->Pos, End->Pos - 1);
}

void RemoveCode(const CodeMark *M)
/* Remove all code after the given code marker */
{
  CS_DelCodeAfter(CS->Code, M->Pos);
  SP_Set(M->SP);
}

void MoveCode(const CodeMark *Start, const CodeMark *End, const CodeMark *Target)
/* Move the code between Start (inclusive) and End (exclusive) to
** (before) Target. The code marks aren't updated.
*/
{
  CS_MoveEntries(CS->Code, Start->Pos, End->Pos - Start->Pos, Target->Pos);
}

int CodeRangeIsEmpty(const CodeMark *Start, const CodeMark *End)
/* Return true if the given code range is empty (no code between Start and End) */
{
  int Empty;
  PRECONDITION(Start->Pos <= End->Pos);
  Empty = (Start->Pos == End->Pos);
  if (Empty) {
    /* Safety */
    CHECK(Start->SP == End->SP);
  }
  return Empty;
}

void WriteAsmOutput(void)
/* Write the final assembler output to the output file */
{
  SymTable *SymTab;
  SymEntry *Entry;

  /* Output the global data segment */
  CHECK(!HaveGlobalCode());
  OutputSegments(CS);

  /* Output all global or referenced functions */
  SymTab = GetGlobalSymTab();
  Entry = SymTab->SymHead;
  while (Entry) {
    if (SymIsOutputFunc(Entry)) {
      /* Function which is defined and referenced or extern */
      OutputSegments(Entry->V.F.Seg);
    }
    Entry = Entry->NextSym;
  }
}
